<template>
    <div>
      <city-header></city-header>
      <city-search :cities='cities'></city-search>
      <city-list 
        :cities='cities' 
        :hot='hotCities'
        :letter='letter'
        ></city-list>
      <city-alphabet 
        :cities='cities'
        @change='handleLetterChange'
      ></city-alphabet>
    </div>
</template>

<script>
import CityHeader from './components/header.vue'
import CitySearch from './components/search.vue'
import CityList from './components/list.vue'
import CityAlphabet from './components/alphabet.vue'
import axios from 'axios'
export default {
    name:'City',
    components:{
        CityHeader,
        CitySearch,
        CityList,
        CityAlphabet
    },
    data(){
        return{
            cities:{},
            hotCities:[],
            letter:'',//接收的alphabet组件的传值，再传给list组件
        }
    },
    methods:{
        getCityInfo(){
            axios.get('static/mock/city.json')
              .then(this.handleGetCityInfoSucc)
        },
        handleGetCityInfoSucc(res){
            res=res.data;
            if(res.ret&&res.data){
                const data=res.data;
                this.cities=data.cities;
                this.hotCities=data.hotCities
            }
        },
        handleLetterChange(letter){//接收alphabet组件的传值,再赋予data
            this.letter=letter;
        }
    },
    mounted(){
        this.getCityInfo()
    }
}
</script>

<style scoped>

</style>